Improvement in driving mechanisms for



lNITED STATES PATENT irren.

SELF- AND DAVID HEATON, 2n, or sans PLAGE.

'IMPROVEMENT IN DRIVVING MECHANISMS FRSEWINGMACHiNES, do.

' Specification forming part of Letters Patent Notdhfl. dated July 12, 1864.

. To all whom it may concern.-

Be it known that I, TURNER WILLIAMS, ot' Providence, in the countyvof Providence and State of Rhode Island,`have 'invented a new and useful Improvement in the Driving Mech-A anisms of Sewing-lilachines,which is also ap-l plicable to other purposes; and I do hereby 'declare th'atthe following is a t'nll, clear, and

exact description of the same, reference being had to the annexed drawings, making part of4 this. specification, in which- Figure 1 is a side elevation ofthe frame and driving mechanism ot' a'sewing-lnachine em- A*bodying my improvement, one side ot'- the' frame being removed to give an unobstructed View of the Working parts. Fig. 2 is a side 1 elevation of the said driving mechanism del, tached and niththe'several partsin a position Acalculated to illustrate'the peculiar inode of operation.` Fig. 3 is a View o't' the reverse side of the driving-wheel M from that shown. in Fig. Ltogether with the parts arranged there-` on. Figs. 4, 5. and 6 are details winch are referred toin the course of the description. Fig. 7, Plate II,.is a side elevation of a modified arrangement. ot' the said mechanism, having the samemode ot' operation. Fig. S is a plait ot' the upper portion ot' the same..` Fig. 9 is a.-

side elevationy ot' said upper portion shown full size. Fig-'10` is a similar view with the plate 1 F removed to show. the interior arrangement. Y Fi gs. lland 12 aredetails which arereferred to in the course ot' the description. Fig. 13 is a p lan ot' the peculiar treadle adapted to driving mechanisms having a similar mode 0f op eration. l l

Similar letters oi reference indicate corresponding 'parts in all the ignres.

In the schedulcvattached t Letters Patent;

' No. 2,723, granted to me, the said TURNERv `WILLIAMS, on the 12th' day of November, A; D. 1861, a description is given of a certain im- 'provement in cranks for driving sewing-ma chines, the distinctive features of ywhich are,

i first, that the connecting-rod (which transmits the movements of' the treadle) is attached to tw'o auxiliary pins, instead otldirectly to the cratil -1'iti, as inthe usual way; and, second,.- that the said auxiliary pins are alternately :connected and disconnected to and from the jcranlt-pin in the act'of'turning the crank by Ifrom its dead-center in one direction only, thereby preventing any backwardmovement,

which would reverse and derange the working of the sewing-machine, and, besides, placing` the movement ofthe main shat't wholly under the control of tite treadle in obtaining a slowl or swift positive movement. of said shaft, and starting from any points ,ot.its revolution, al

ways in one and consequently the right direction.' I i The improvement hereinafter described's an imp i'ovement ot' .the invention so. patented on the 12th of November, 1861, yand although.

as will be seen, the connecting-rod is attached 1 to two auxiliary pins, instead-ot' directly to the crank-pin, the othery and remaining portions ot' the mechanism are materially changed, so muchA so that a new mode of. operation is produced (littering essentially from the. aiternat-e connecting and disconnecting ot' the twov aux# iliary pins to andtrom the crank-pin .bvnieans' of the treaille, which is the second feature otiin'provement, although thegeneral result in the movement ot" the. crank forward iti-one di.- rection and past the diend-centerissimilar.

A My present invention consists in arrangiug'- thetwo auxiliary pins in the two opposite ends 0f arocking lever on the crank-pin; in connec'ting thesaid auxiliary pins to the treadle` by two curved connecting-rods,andiin the use ot' a treadle formed in two parts, each ot'whic'h has or is susceptible 'ot' an opposite movement in one direction, and by reasonot' the two ccnnecting-rods being attached each to oneot' the two parts of the treadle the said `opposite` moveinent ofthe treadle is transmitted tothe -two opposite ends of' the said rocking lever, l,

which produces anengageincntof a pawl or ratchetvwith a ratchet-wheel on the crank-pin, thereby rendering the said rocking lever fixed and imn'iovable with'rcsprct to the crankfpin,` so that the further rocking movement of vthe said lever`impvels the crai'ik'ibrtmrd intheonel `desired direction past the .deadcentcr' by a `force applied to both the auxiliary pins simuh which i's fitted to turn freely inthe hub or boss pinis turned in the hub min the direction inwhich, and eqnidistant from the crank-pi, are

land their 'lower ends are attached at a comcalculated 4for one foot of the `operator, andexcept in the contingency above alluded io.

' and Vfacility with which a crank can be turned 'byfmeans of atreadle; but in the eventof a taneously in advance andbehind or following thc crank-pin, thus producing a more equabie revolution of the main or driving shaft without any perceptible extra exertion on the treadle.

To enable others whoare familiar with machines of this character' to make and use my said invention, I willproceed to describe the same.

In Fig. 1, A is the frame which Amay be ot'4 cast-iron. drivingshaft; M, the driving-pulley, and C a balance-wheel thereon.

d is the crank-pin,

in, formed on the driving-wheel' M, as'shown clearly in Figfet. l is a ratchet-wheel secured on one end ot' said'crank-pnl on the back side' ot the driving-wheel, as shown in Fig. 3, and t t are two ratchets, which are arranged to engage with the ratchetwheel when the crankdicated lby the arrow, and to become disengaged and allow the said crank-pinto turn freely in the said hub m in the opposite direction, the disengagement beingprodnced vby the pressure ot' the ends of the springs i z' against the'sides ot' the ratchet-wheel, which, when turned iu the given direction,' have thel elect to lift the ratchets out of the teethot' the wheel and press them against the-pins 5, fixed in the driving-wheel, the use of such' springs for the purpose being old andwell known. .Tothe opposite end ot' the crank-pin'fd is secured the 'rocking lever k, in the opposite ends of secured the two auxiliary piush h, to which the upper endsot' the two connectingrods L L are attached in a'swinging `joint. These connectingrods are formed as shown to provide for their respective movenwnts in connection,

mon point to two separate. studs. 1' 1", in the treadle 'Las shown clearly in Fig. 2. This treadle T is formed intwn pieces, each being the two pieces are designed to move together as a whole until the contingency arises of a stoppage onithe dead-centcr, and to that end a spring, S, is secured at one end to the .hub' 'n ot' one foot-piece of thc said tre'l\d le, w hile the other end presses against the under 'side` ot' the heel ot' the other foot-piece, and so arf ranged serves tokeep the twov toot-pieces together and cause them to act asY one treadle,

In connection with the said spring' a stop or projectiomj, is provided on the toe ot" oneV of the 4foot-pieces,I which bears against a corresponding projection beneath it on the other foot-piece bythe t'orce ot'- the springS',and thus holds the two pieces in position, as shown in Fig.2 and in""Fig. 13.

The several parts being thus arranged, the operation is that, with both feet upon the treadle, theV crank is turned with all the usual ease B is the main on;

lpart ot' one foot-piece, vlng against a cam, g,

'stoppage on the dead-center-as, for in.',-tance,- in the position vshown in Fig. 1-by an oppoysite movement of the feet, which will separate the two foot-pieces, as shown in Fig. 2, the crank-pin becomes instantly xed and stationand the opposite movement ary iu itsh'ub m,

transmitted to the of the two 'foot-pieces is two auxiliary 'pins h the lever, which results in carrying thev crank easily past the dead-center in the direction indicated by the. arrow toand forward from the position shown in Fig. 2, revolution of the shaft and driving-wheel.-

`In the modification ot' the construction and arrangement already above described, as ex lnbitei in Figs. 7, 8, 9, l0, Svc., the crankpin fl is'xed in the crank iu the usual way, the

ratchet-wheel L is fixed on the outer end ot' lsaid crank-pin, and the rocking lever k turns freely ontbc crank-pin when'the crank is turned in 'the given direction, iu lieuot' the crank-pin turning in thefhub'mof the wheel M, as stated in the p revious description, the immediate effect being .alike in both instances. In Figi() only one-ratchet, with its ratchet-wheel@ is'inclosed within this portionv ot' the rocking lever a. cap, F .to exclude the dust, as seen in Fig. 9.

The form and'construction of the ratchetare shown in detail iu'Figs. 5 and 6, in which a lip, i1,- i's shown, which extends beneath the edge ofthe ratchet-wheel and keeps the ratchet' in its place. f Fig. ]2 shows one form of construction of one o f the curved eonuectingrods Il.

Fig. v`13 represents a modification in the arrangement of' the spring-,S with' the two footpieces of the treadle,'th'e said spring in Athis instance being firmly riveted to the toe or fore v4Fig. 11f'ormingpart ot the hub n; otl theother the modeof operation and eii'rct being the same as-above described.

i Having thus described theconst'ruction and operation ot my improved mechanism, wish it understood that l do not restrict myself to the particular construction and arrangementot' the parts as described; but l' claim all merely vformal variations performing the same mode ot" operationjby equivalent means.

'-,What i'clailm, and'fdesire to' secure by Letters Patent, isf

'lhe arrangement of the auxiliary pins h h, the rocking-lever 7c, and crank-pin rhjfasrie-fV scribed, in combination with a pairot' curved connecting-rods,`or their equivalent, andra -treadle constructed in twoparts, as described,

the whole operating substantially as specified.

TURNER WILLAMS. Witnesses: ISAAC A. BRUNNELL, GEORGE G.. PHILLIPS.

h with an effect to rock;

and to continue the t, is shown, which,

and coveredwith` with its loose end beari foot-,piece, andserving `to press the foot-piece Tatj the foremost, end 

